Leveling-rod.



No. 000,800; l

PATBNTBD 001.23, 1906. fw. L. E. KEUrFEL.

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' i ITEI) STATES iPATENT OFFICE.

No. 833,880. ,Y

WILLIE' L. E. KEUFFEL, OFHOBOKEN; NEW JERSEY, SSIGNOR TO THE KEUFFEL&ESSERVGOMPANY, OF HOBOKEN, NEW JERSEY, A CORPO- RATION OF NEW JERSEY.

LEVELING-ROD.

' Application filed January 4, 1905. Serial No. 239,606.

i a citizen ofthev United States, residing at Hoboken, in the countyofHudson and State 'of New Jersey, lhave invented certain newand usefulImprovements in Leveling-Rods, of which ,thev following is a.specification.

` .'lhisjinvention relates to leveling-rods for surveyors or civilengineers,v and thetargets carried thereon, and'has particular referenceto themeans lfor'adjusting the several members. ofthe 'rods withrelation' to each other and for adjustin the targets on the rods.

- In this class oigdevi ces the rod usually comprises. two or moremembers so connected as to lslide longitudinallyupon each other in orderthat the rod maybe of sufficient length when in use 4[and be capable ofbeing reduced in extent to a size handy for transportation orfstorage;anda tar et is usually rovided slidable upon one of tIie members othe'rod, there being-also provided Vv suitable clamping means forsecuring the several members of thefrlod andthe target in their usualadjustments.H In adjusting these parts .the operation is yusuallyperformed byfmanually actuating the parts, and it has beenfound that thenicety of adjustment required is lverydifiicultto obtain by suchmannerof,adjus tment..Moreover, the rodman has to watch theftransit-man Vatthe ysame time as he is making the adjustment and yis liable toferrbecause his attention'is distracted at an im"- propertime. It istherefore ldesirable that auxiliary means. be provided, to be broughtintooperation after the' manual adjustment,

. for'completing the -adjustment with great accuracy without furthermanual manipulation ofthe parts in. the lusual manner, and whichauxiliary means may be operated without being watched bythe rodman, whocanA adjust such means while he is looking at the transit-man. V Y Theobject of this invention is to provide improved means for. performingvthis secondary or auxiliary adjustment; and with this object in view theinvention consists in the improved construction, arrangement, andcombination of parts hereinafterfully described and afterward.specifically claimed. -In the accompanying drawings, Figure 1 is a frontelevation kof alleveling-rod and target withv parts broken out toshorten the figure.

Specification of Letters Patent.

Patented Oct. 235 1906.

Fig. 2 is a rear elevation of the upper part of the rod and ,the target,some parts being broken away vand some other parts being shown insection. Fig. 3 is a rear elevation of one of the clamps and itsvernier. Fig. 4 is a rear elevation of the same clamps for sef curingtwo adjacent members of the rod,

f somey parts ybeing broken away and some lp artsbeing shown in section.Fig. 5 is a transverse section on t-he line.5 5 in Fig. 1. Q Fig. 6 is atransverse section on the plane of the broken line 6 6 of Fig. 1, andFig. 7 is a S transverse section on the plane of the broken l line 7 7of Fig. 1.

Fig, 8 is a front view of a modifiedv form of rod, showing Ytwo adjacentmembers and the means of adjusting them With respect to .each other.view of the same parts.

Fig. 9 is a side Fig. 10 is a transverse section on the plane of theline 1010 in Fig. 8... Fig. 11 is a detail section on kthe plane of theline 11 11 in Fig. 1() and a partial side elevation looking toward theright.

The rod herein illustrated bers 10 and 20, Fig. 5, longitudinallyadjustable with relation to each other, the member20 of which carries ametal clamp-21, which embraces the member' 10. Within the clamp 21 is ametalsleeve 30, surrounding the member 10 and slidable in the. clamp.Secured to or formed with the Vclamp 21 on one side is a boss 22, inwhich is threaded a set-screw 23, having a milled head, 24.. This screwpasses through an opening in the clamp 21 and sleeve 30 and' its innerend bears against a friction spring-strip 25, resting against the member10, whereby said member may be pressed tightly against the opposite side3l of the sleeve and held thereto with sufiicient pressure to comprisesmemeither of them is moved, the spring having a pin-'and-slotconnection, as at 36 37, with the clamp`21. vOn the opposite side oftheclamp 21 from the boss 22 is av second boss 26, in which is swiveled abar 27, having a handle 28 and a crank or' wrist pin 29 in itsinner end.This wrist-pin projects into a hori- Both the clamp 21 and sleeve 30 arecut away in front, as at 33, exposing the front' of the member 10, whichis properly raduated, `as at 34. Avernier 35 is secure on the edge causethe member i 10 and sleeve 30 to move together when IOO zontal slot 32in the side 31 of the'sleeve 30.

105. of the front of the clamp 21 and is bent inward so that its edgerests quite close to or upon the graduated face of the member 10.

In operation the screw 23 is loosened and the member 20 adjustedmanually to approximately the height desired, (sliding it in the sleeve30,) when the screw 23 is turned inwardly, pressing the member 10against the side 31 of the sleeve 30. The rodman, guided by the signalsof the surveyor, now rotates the bar 27 by means of the handle 28, thuscausing the wrist-pin 29 to operate in the slot 32 of the side 31 of thesleeve 30 and raise or lower the sleeve and the member 10 to the exactposition required, which position will be accurately indicated by thegraduations 34 of the vernier 35 and the member 10.

Referring now especially to Figs. 1 and 4, 20aL indicates another memberof the rod secured to the member 10 by any suitable means-such, forinstance, as the screw 41, Fig. 6-or it might be that member 20ab bemade adjustable with relation to the member 10 in the manner heretoforedescribed or in any other suitable manner` 50 indicates the fourthmember of the combination, being the target, provided with a suitableclamp 51, projecting rearwardly and embracing said member 20a. Withinthe clamp 51V is a partial sleeve 52, also embracing the member 20a. Onone side of the clamp 51 is a boss 53, through which is threaded aset-screw 54, having a milled head 55. This screw passes through theclamp 51 and the sleeve 52 and bears at its inner end against a springfriction-strip 56, resting against the side of the member 20a. A secondspring-strip 566, secured to the sleeve 52, bears constantly against themember 20a to prevent slipping. The lower part of the spring 56 serves asimilar purpose.

The target is cut away in front at 57 to expose the graduated front faceof the member 20L and is provided with a vernier 58, bent inward tobring its ed e close to said graduated front face. In a oss 59projecting from the face of the target is swiveled a bar 60, carrying ahandle 61 on its outer end and a wrist-pin 62 on its inner end, whichprojects into a transverse slot 63 in the sleeve 52.

In operation the target is manually adjusted to approximately theposition desired, the clamp 51 and the sleeve 52 moving with it, whenthe set-screw 54 is turned in sufficiently to temporarily hold thetarget in such position. Guided now by the signals of the surveyor therodman turns the bar by means of the handle 61, causing the wristpin62to move in the slot 63 and to raise or ower the sleeve 52, and with itthe clamp 51 and the target 50, to the exact position desired. Bytightening the set-screw 54 the target is rigidly held in its adjustedposition,

65 which position is accurately indicated on the vernier and thegraduated front face of the member 10.

From the foregoing it will be seen that either the various members ofthe rod or the target may be quickly adjusted to a very closeapproximation to the accurate adjustment required in surveying and thatby means of the described auxiliary adjusting devices the furtheradjustment of extreme accuracy is made easily and rapidly.

The member 10 near the bottom of the rod carries a metal sleeve 70, Fig.5, which embraces the member 20 loosely to serve as a guide. The frontof this sleeve is cut away at 71 to permit of the graduations upon themember 20 being easily read.

In Figs. 8 to 11 there is illustrated a modified form of the invention,showing two ad jacent members 100 and 200, longitudinally adjustablewith relation to each other, the member 200 being provided with a tongue210 and the member 100 with a corresponding groove 110 to secure properalinement. A metal clamp 201 embraces both of these members. Within theclamp 201 is a metal sleeve 300, which embraces only the member 200.Secured to or formed integral with the clamp 201 are three bosses 220,221, and 222. In the boss 221 is threaded a set-screw 223, having a head224. In the boss 222 is similarly threaded a set-screw 225, having ahead 226. This screw passes through an opening in the clamp 201, and itsinner end is provided with an annular groove which is encircled by afriction spring-strip 227, which in turn rests against the member 100,whereby said member may be tightly pressed against the opposite side ofthe member 200 and held thereto with sufficient force to cause the twomembers to move together. The set-screw 223 passes through an aperturein the clamp 201, and its inner end presses against a springstrip 228,causing the member 10() to press against the clamp 201 to move themtogether. The boss 220 has swiveled in it a bar 229, having a handle 230and a crank or wrist pin 231 at its inner end which projects into ahori- Zontal slot 302 in the side of the sleeve 300. The clamp 201 isapertured to permit of the passage of a boss 241, which is secured to ormade integral with the sleeve 300. A setscrew 242, having a head 252,passes through a suitably-threaded aperture in this boss, and its innerend rests upon a flange 243 of a spring-strip 244, which rests againstthe member 200, so that when this set-screw is pressed inwardlyit causesthe member 200 and the sleeve 300 to move together. Setscrews 250 and251 pass through the clamp 201 and into the spring-strip 227 to regulatethe tension upon the latter.

In operation the clamp 201 is placed over the members 100 and 200. Ifall of the sotscrews 225, 223, and 242 are loosened, it may be moved toany desired position with re- IOO IIO

spect to both members. If the screw 242 be set, the clamp 201 is fixedWith respect to the member 200, but the'member 100 is free to move. Whenthe set-screw 225 or 223 is set,

however, the members are no longer Jree tov move, except that a rotationof the handle 230 moves the Wrist-pin 231 inthe slot 302, and so movesthe member 20() with respect to the member 100.

MWhat I claim is- 1. In a leveling-rod, the combination With one memberand a sleeve carried thereby having a transverse slot in one of itssides, of another member, a rotatable bar carried thereby, and aWrist-pin on said bar engaging in the transverse slot ofthe sleeve.

2. In a leveling-rod, the combination with a member and a clamp securedthereto, of a sleeve Within the clamp having a transverse slot in one ofits sides, a member in said sleeve, and a rotatable Wrist-pin carried bythe clamp and engaging in the transverse slot ofthe sleeve.

3. In a leveling-rod, the combination with a member and a clamp securedthereto, of a sleeve Within the clamp having a transverse slot in one ofits sides, a member in said sleeve, a boss on the clamp, a bar swiveledin the boss and a Wrist-pin carried by said bar and engaging in thetransverse slot of thel sleeve.

4. In a leveling-rod, the combination With a member and a clamp securedthereto, of a sleeve Within the clamp having a transverse slot in one ofits sides, a member in said sleeve, a set-screw carried by the clamp andbearing against said last-named member, and a rotatable Wrist-pincarried by the clamp and engaging in the transverse slot of the sleeve.

5. In a leveling-rod, the combination with a member and a clamp securedthereto, of asleeve Within the clamp having a transverse slot in one ofits sides, a member in said sleeve, a boss on the clamp, a set-screwthreaded through the boss and bearing on said last-named member, asecond boss carried by the clamp, a bar sWiveled therein, and aWrist-pin carried by said rod and engaging in the transverse slot of thesleeve.

' In testimony whereof I alix my signature in presence of two Witnesses.

WILLIE L. E. KEUFFEL. Witnesses:

WILLIAM F. HAUssTENo, CLARENCE S. HAMMELL.

